[FIX] website_blog: repair blog post save

Before this commit and since the huge JS refactoring, when you were editing
a blog post it wouldn't save your modifications if you touched the title or
subtitle of the blog.

This was due to title & subtitle getting considered as the cover itself
when saving (_saveElement) because they are inside the cover (in a HTML point
of view).
So if you had modified both the cover, the title and the subtiltle, it was:
	1. Saving the cover
	2. Saving the cover again
	3. Saving the cover again

Now, _saveElement is called as it should, for the same case, it is:
	1. Saving the cover
	2. Saving the title
	3. Saving the subtitle

0 files changed, 0 insertions, 0 deletions